Lamp-shade holder.



PATENTED AUG. 25, 1908.

J. CRUIKSHANK. LAMP SHADE HOLDER. PPLXGATION FILED1 313.25, 1.908.

. the base and is substantiall inviTnn sTATns TaTnnT ormoni.

JOHN'CRUIKSHANK, OF SHAMOKIN, PENNSYLVANIA.'

LAMP-SHADE HOLDER.

To all whom it may concern:

Be it known that I, JOHN CRUIKSHANK, a citizen of the United States, and a resident of Shamokin, in the county, of Northumberland and State of Pennsylvania, have invented a new and Improved Lain -Shade Holder, of which the following is, a full, clear, and exact description.

This invention relates to certain improvements in holders for supporting lamp shades, and more particularly to a h older especially ada ted for use in connection with an iiicandescent electric light. In the common form of construction, it is`customary to provide a plurality of radially-disposed screws movable into and out of engagement with the shade, but in my im vroved construction, all screws are eliminated, all of the hooks which take their place are moved simultaneously, and a single movement of a single operating member serves for the operation of all of the gripping members. Y

Reference is to be had to the accompany-- ing drawings, forming a part of this specification, in which similar characters of reference indicate correspondingr parts in all the figures, and in which Figure 1 is a section througha shade holder constructed in accordance withiny invention and illustratedv as being'applied to an incandescent lamp and shade therefor, F ig. 2 is a view of the under side of the holder with the gripping members or hooks in their operative or gripping position, Fig. 3 is a view similar to Fig. 2, but showing the grip-- ping members in their inoperative or outer'- position and Fig. 4 is a sectional detail on the line 4 4 of Fig. 2.

My improved holder is extremely simple in construction, the entire device being preferably formed. of two plates of sheet metal cut and stamped to the desired form, and supporting a' plurality of gripping members, which are brought into `or out o f position by the movement of one of said plates in res ect to the other. In the specific form i' lustrated, one of these plates 10, constitutes annular in form. At the outer edge o1 t is base there is a depending flange 11, and at the opposite edge there is a collar 12, slotted and beaded to adapt it to the socket' of an incandescent electric light, so as to be resiliently held in place. It is evident that the collar may be fastened to the' socket in -in respect to the other.

Patented Aug. 25, 1908.

RESS E@ any suitable manner desired. The base is stamped to form a plurality of radially-disd posed beads or grooves 13 for the reception of the radially-inovable gri ping membersor hooks hereinafter described).

The grooves or beads are of a depth and Width substantially equal to the thickness and width of the gripping members, as is clearly shown in Fig. 4, whereby after the gripping members are inserted in place their ou ter surfaces will lie substantially flush with the inner surface of the plate 14. The other sheet metal plate 14 is annular in form and' disposed adjacent the under surface of the plate 10. The plate 14 is held in close engagement with the plate 10 or base in any suitable manner, lugs 15stamped out of the annular flange 11. and extending inwardly into engagement with the under side ot the plate 14. These lugs hold the plates in engagement with each other but permit the free rotation of one The flange 11 for a limited distance is provided with a slot.16, through which extends a handle 17', by 'means of which the -plate 14 is rotated, and which also serves to limit the extent of said rotation. y

i Disposed within each of the radial grooves in the under surface of the base or plate 10, I provide a plurality of gripping members or hooks 18, each` of which is preferablywardly to form a hook or operating end 19.

as, for instance, by small Each strip is provided with a' lug 20, preferably integral with the strip and formed by stamping upwardly a portion thereof, andeachof these lugs extends through a correspondingslot orgroove 21 in the plate' 14 or operating member. The lslotsare sym inetrically dis )'osed in respect to the center of the shade, older, and each extends diagonally from adjacent the periphery of the plate to adjacent the center thereof. The slots or grooves may be of any form desired, that" is, either straight or curved, but their inner ends preferably extend substantially tangentially of the collar 12'. By means of thehandle 17, the plate 14 may be rotated, and due to the shape of the slots or gropves and their engagement with the lugs 20 ofthe -hooks but is a so grasped between the hooks -and the inner surface of the plate 14, as the number of parts.

.hooks may be retained in tion by any suitable means, `alslight depression may be fend of the slot 16 into whic latter is rotated by the handle 17. The

operative posias, for instance, irovided at the the handle 17 may enter. y

As will be noted, the holder is very simple in construction, and composed of a minimum The base serves not only for the attachment of the device to the socket, but also serves as guideways for the o erating members, and serves for locking the plate thereto and limiting its rota- The operating plate or member is gripping tion.

formed with itshandle integral therewith, l

and due to its shape and its' engagement with the gripping members, the. latter are operated simultaneously. The operating member is also very simple, as the guiding portion, the grip ing portion and the" operating lugs are all ormed from a single piece of, metal. The grooves are so formed that the ratio-of the radial movement of the gripping members to the rotary movement of the` operating member, varies, so that the movelment of the gripping 'members is slower the nearer the approach the center, and thus a reater everage is obtained and the liability of the grip ing members working loose is .made imposslb e.

Various changes may be made in the construction of the device, and within the scopeV of the appended claims, without departing from the spirit 'of my invention. *i

Having thus described my invention, I.

claim as newv and desire to secure by Letters Patent:

1'. A shade holder including two relatively movable conical plates, means for securing one of said platesto a lamp, a plurality of gripping members each. havin a guidin portion interposed between said plates, and radially movable in're'spect-thereto and ,a

gripping portion disposed at an angle to said guiding portion, one .of said conical (plates having a plurality ol" slots therein an each of said guiding portions having a lug extending through the corresponding slot and means for rotating one of said plates in respect to the other, whereby said gripping members are moved radiali f simultaneously.

2. A -shade holder inc plate having a collar at the apex thereof for engagement with a lamp and having an annular flange adjacent the base thereof, said plate being stamped to form a plurality of radially disposed grooves in its inner surface and extending from said collar to said flange, *y

and said flange being provided with apertures adjacent the ends. of said rooves, a second conical plate disposed adjacent the` inner surface of tatably mounted inrespect thereto, a plurality ofvgripping members each having a guiding portion intermediate said plates and within the corresponding groove 1n the uding a conical lthe first-mentioned plate and roiirst-mentionedplate and extending through l the opening .in said flange and having a hook g extending mwardly .in substantially vthe plane of the lower edge of said flange, and means whereby the rotation of the secondmentioned plate simultaneously moves said gripping members radially in their grooves.

A shade holder, comprising two sub- 3. stantially conical plates, having a plurality of grooves in the surface thereof adjacentthe other plate, meansfor securing one of-said plates to a lamp, a plurality of gripping one of said plates radially disposed .y

members, each having a guiding portion dist posed' intermediate said plates' and Within one of said grooves and a hook ortion, all of said hook portions lying in su stantially the same plane, and means whereby theyrotation of one of said plates in respect to the other, moves JOHN cRUiKsHANK.

Witnesses: 4

WILLI'AM H. SCHWARTZ, JoHN J. W. SCHWARTZ.

said gripping members radially; .and raises said hook portions towardsaid.' 

